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Temperature Simulation of Supersonic & Hypersonic Kinetic Energy Projectiles
CHEN Xinhong, ZHOU Zhichao, ZHAO Runxiang, XU Houqian
CHINESE JOURNAL OF COMPUTATIONAL PHYSICS    2010, 27 (6): 861-868.  
Abstract293)      PDF (408KB)(967)      
A method with CFD technology is used for accurate prediction of temperature field of supersonic and hypersonic kinetic energy projectiles.It includes equilibrium flow governing equations and difference scheme,equilibrium flow Jacobian matrixs and equilibrium gas state equations.A real gas equilibrium air model is used to calculate temperature in vector flux split in a difference scheme.Thermal environment for typical high-speed kinetic energy projectile is validated.Rationality of the method is considered.Temperature field of a designed hypersonic kinetic energy projectile is simulated.Reliable numerical data for projectile aerodynamic design and aerodynamic heat protection are provided.
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Simulation of Complex Flows with Large-scale Moving Boundaries
WANG Bing, XU Houqian
CHINESE JOURNAL OF COMPUTATIONAL PHYSICS    2008, 25 (4): 396-400.  
Abstract259)      PDF (306KB)(1094)      
Complex flow with large-scale moving boundaries is divided into a moving boundary zone and a common flow zone connected by a special interior boundary named zone interface. Local remeshing method is applied to deal with grid-reforming of a high-speed bullet. The axis is defined as a special grid-deforming boundary to avoid negative volume of grid near the axis. Arbitrary Lagrangian-Eulerian (ALE) formulation is used to solve unsteady process of a bullet leaving a muzzle. It indicates that the bullet is accelerated and then decelerated gradually.
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